Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves

Erik Damgaard Christensen, Stefan Carstensen, Mikael Thyge Madsen, Peter Allerød Hesselbjerg, Christel Jeanty Nielsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The total wave load on a gravity based foundation for offshore wind turbines is influenced by the pore pressure from beneath the structure. The pore pressure is induced by the wave–structure-seabed interaction. Often the uplift force is included in a simplified way in the design of the gravity based foundation. This leads typically to very conservative designs in order to accommodate the uncertainties in the procedure. The experiments shall lead to better prediction models based on for instance CFD model’s with the direct calculation of pressure variations in the seabed and any erosion protection layer. Herewith, it will be possible to get a direct assessment of wave loads on the foundation, also under the seabed level. The study includes experiments as well as numerical analyses. A good agreement between the experimental results and the numerical analyses was found. In the numerical analyses, it was possible to investigate the effect of air content in the pores, which turned out to have an effect on the distribution of the pore pressure.
Original languageEnglish
Title of host publicationProceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36)
Number of pages10
Volume10
PublisherAmerican Society of Mechanical Engineers
Publication date2017
Article numberOMAE2017-62585
ISBN (Electronic)978-0-7918-5778-6
DOIs
Publication statusPublished - 2017
Event36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36) - Trondheim, Norway
Duration: 25 Jun 201730 Jun 2017

Conference

Conference36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36)
CountryNorway
CityTrondheim
Period25/06/201730/06/2017

Cite this

Christensen, E. D., Carstensen, S., Madsen, M. T., Allerød Hesselbjerg, P., & Nielsen, C. J. (2017). Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves. In Proceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36) (Vol. 10). [OMAE2017-62585] American Society of Mechanical Engineers. https://doi.org/10.1115/OMAE2017-62585
Christensen, Erik Damgaard ; Carstensen, Stefan ; Madsen, Mikael Thyge ; Allerød Hesselbjerg, Peter ; Nielsen, Christel Jeanty. / Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves. Proceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36). Vol. 10 American Society of Mechanical Engineers, 2017.
@inproceedings{659adf486879434d950d64a59ffe427f,
title = "Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves",
abstract = "The total wave load on a gravity based foundation for offshore wind turbines is influenced by the pore pressure from beneath the structure. The pore pressure is induced by the wave–structure-seabed interaction. Often the uplift force is included in a simplified way in the design of the gravity based foundation. This leads typically to very conservative designs in order to accommodate the uncertainties in the procedure. The experiments shall lead to better prediction models based on for instance CFD model’s with the direct calculation of pressure variations in the seabed and any erosion protection layer. Herewith, it will be possible to get a direct assessment of wave loads on the foundation, also under the seabed level. The study includes experiments as well as numerical analyses. A good agreement between the experimental results and the numerical analyses was found. In the numerical analyses, it was possible to investigate the effect of air content in the pores, which turned out to have an effect on the distribution of the pore pressure.",
author = "Christensen, {Erik Damgaard} and Stefan Carstensen and Madsen, {Mikael Thyge} and {Aller{\o}d Hesselbjerg}, Peter and Nielsen, {Christel Jeanty}",
year = "2017",
doi = "10.1115/OMAE2017-62585",
language = "English",
volume = "10",
booktitle = "Proceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36)",
publisher = "American Society of Mechanical Engineers",
address = "United States",

}

Christensen, ED, Carstensen, S, Madsen, MT, Allerød Hesselbjerg, P & Nielsen, CJ 2017, Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves. in Proceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36). vol. 10, OMAE2017-62585, American Society of Mechanical Engineers, 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36), Trondheim, Norway, 25/06/2017. https://doi.org/10.1115/OMAE2017-62585

Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves. / Christensen, Erik Damgaard; Carstensen, Stefan; Madsen, Mikael Thyge ; Allerød Hesselbjerg, Peter ; Nielsen, Christel Jeanty.

Proceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36). Vol. 10 American Society of Mechanical Engineers, 2017. OMAE2017-62585.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

TY - GEN

T1 - Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves

AU - Christensen, Erik Damgaard

AU - Carstensen, Stefan

AU - Madsen, Mikael Thyge

AU - Allerød Hesselbjerg, Peter

AU - Nielsen, Christel Jeanty

PY - 2017

Y1 - 2017

N2 - The total wave load on a gravity based foundation for offshore wind turbines is influenced by the pore pressure from beneath the structure. The pore pressure is induced by the wave–structure-seabed interaction. Often the uplift force is included in a simplified way in the design of the gravity based foundation. This leads typically to very conservative designs in order to accommodate the uncertainties in the procedure. The experiments shall lead to better prediction models based on for instance CFD model’s with the direct calculation of pressure variations in the seabed and any erosion protection layer. Herewith, it will be possible to get a direct assessment of wave loads on the foundation, also under the seabed level. The study includes experiments as well as numerical analyses. A good agreement between the experimental results and the numerical analyses was found. In the numerical analyses, it was possible to investigate the effect of air content in the pores, which turned out to have an effect on the distribution of the pore pressure.

AB - The total wave load on a gravity based foundation for offshore wind turbines is influenced by the pore pressure from beneath the structure. The pore pressure is induced by the wave–structure-seabed interaction. Often the uplift force is included in a simplified way in the design of the gravity based foundation. This leads typically to very conservative designs in order to accommodate the uncertainties in the procedure. The experiments shall lead to better prediction models based on for instance CFD model’s with the direct calculation of pressure variations in the seabed and any erosion protection layer. Herewith, it will be possible to get a direct assessment of wave loads on the foundation, also under the seabed level. The study includes experiments as well as numerical analyses. A good agreement between the experimental results and the numerical analyses was found. In the numerical analyses, it was possible to investigate the effect of air content in the pores, which turned out to have an effect on the distribution of the pore pressure.

U2 - 10.1115/OMAE2017-62585

DO - 10.1115/OMAE2017-62585

M3 - Article in proceedings

VL - 10

BT - Proceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36)

PB - American Society of Mechanical Engineers

ER -

Christensen ED, Carstensen S, Madsen MT, Allerød Hesselbjerg P, Nielsen CJ. Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves. In Proceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36). Vol. 10. American Society of Mechanical Engineers. 2017. OMAE2017-62585 https://doi.org/10.1115/OMAE2017-62585